Aerial loop mechanism for radio receiving sets



Oct. 23, 1928.

` v. ALVEAR AERIAL LOOP MECHANISM FOR RADIO RECEIVING SETS Filed Feb. 2, 1924 j k L Patented Oct. 23, 1928.

UNITED STATES PATENT OFFICE.

VICTOR ALVEAR, OF BROOKLYN, NEW YORK, ASSIGNOR TO RADTO CORPORATION OF AMERTCA, A CORPORATION F DELAWARE.

AERIAL LOOP MECHANISM FOR RADIO RECETVITG SETS.

Application led February 2, 192%. ySerial No. 690,141.

This invention relates to aerial loop mechanism for radio receiving sets and particin larly to mechanism of this type in which the loop is rotatably mounted on the casing of the receiving set.

Tts main object is to provide improved means to bring the loop in this class of apparatus to the desired impulse receiving positions, and another object is to provide means to indicate such positions on a suite 'able scale, dial or similar device. Another object is to provide an improved removable loop, improved means to support such a loop, and also to provide improved translating means from the loop through the supporting" means to desired points in the receiving instrument so as to connect with the devices of the same.

The means ordinarily employed for supporting, housing, and connecting rota-table aerial loops, have not proven entirely satis factory, and are many of them inconvenient and likely to get out of order. My improve ments are designed to remedy these faults and to provide a more eflicient and convenient mechanism for this purpose than any other suc-h appliance non7 known to me.

The means I prefer to employ for accomplishing the above objects together With various advantageous features of my improved radio loop mechanism which will appear as the description progresses, are illustrated in the dra-Wing accompanying and forming part of this specification, and in Which- Figure 1 is a front elevation on a reduced scale showing the casing of a radio receiving set With the aerial loop therefor, together With a loop operating handle and dial mounted on the casing;

Fig. 2 is a transverse vertical section on a larger scale taken on the line 2-2 of Fig. 1.

Fig. 3 is a plan of a portion of the loop mechanism, and

Fig. 4 is a front elevation of the dial and a portion of the casing.

Referring to Figs. 1 and 2, the numeral 2 denotes the casing of a radio receiving instrument, Which may be of any suitable t 7pe. The numeral 3 indicates a suitable aerial loop for the radio receiving instrument and is preferably mount-ed on the casing 2 so asr to be adapted' to turn on its vertical axis. Suitable bearings are employed to house and support the vertical shaft 4L of said loop and said bearings may be of any suitable form such as those indicated by the numeral 5 and they are secured to the casing 2 by suitable means such 'as the screws 6. lPreferably the shaft e is inserted in a tube 7 of insulating material and the latter is provided with bearing members suoli as the metal sleeves 8 firmly secured on said tube as by pins 9, and one of said sleeves is provided with a shoulder 10 adapted to be supported by the respective bearing 5 adjacent to said shoulder and thereby support the vertical shaft` 1, the Wirin g L of the loop, together with all other parts of the same. The bearings 5 may be of insulating material or have bushings of the same shown. There is a gear 11 secured to the tube 7 and said gear meshes with a pinion 12 secured to the horizontal shaft 18 mounted in suitable bearings 1e in the casing 2, said gears ordinarily being bevel gears differenf tially proportioned. On the outer end of the shaft 12 is a handle 15 or manual member for turning said shaft 13, and there is a dial portion 16 Which is ordinarily provided with suitable indicia such as graduations 17, and there is also a cooperating indicating member or mark such as 18 fixed on the casing 2. Other indicia may also be used on the dial portion such as the initials of various radio sending stations as indicated by 19 or other suitable indications.

There are tivo spring contact members which are so placed as to make contact With the bearing sleeves 8, and said contact members are preferably in the form of spring plunger 2O placed in suitable holes 21 in the bearings or housings 5. The said plungers 20 are preferably provided with shoulders 22 and there are coil springs 28 placed around the stems of the plungers and bearing respectively against said shoulders 22 and the portion of the casing to Which it is secured. The inner ends of the spring plungers are provided With suitable terminal portions such as the nuts 25, to which can be secured the Wiring -connections 26, 27, connecting to various devices of the receiving set.

Ordinarily the loop Wiring L is connected to the sleeves 8 by conductors such as 28, 29. A third Sleeve 8O may also be secured to the tube 7 and connected to the loop Wiring L as by aI conductor 31 in any suitable Way, and a spring contact member 32 can be provided to connect it to the Wire 33 and thence to any selected device in the receiving instrument.

Vhen transporting the radio receiving set,

the loop can be removed by first loosening the set screw 34 of the large gear l0 so that the loop shaft can be drawn upward together with the bearing sleeves 8 and thus separated from the casing 2 and other parts of the mechanism secured thereon.

It is evident that the mere mechanism for giving the several movements to the various parts may be changed or modied in different ways and any suitable form of parts may be employed Without departing from the spirit and principle of the invention and I do not therefore confine myself to the details of construction here shown.

What I claim is 1. Aerial loop mechanism for a radio receiving set, embodying a rotatable, vertical, loop shaft supporting loop Wiring, a pair of insulated, spaced, rotatable bearing-members secured to said shaft, a pair of fixed journalbearings for said bearing members, electric contact members, one for each of said bearing-members, means to connect the loop Wiring to said bearing members, and means to connect the two contact members to the receiving devices of said set.

2. Aerial loop mechanism for a radio receiving set, embodying a removable, rotatable, vertical, loop shaft supporting loop Wiring, a pair of insulated spaced apart bearing members rotatable With said shaft, a pair of spaced apart ournal-bearings to house said shaft by means of said bearing members, means to effeet sliding electrical connection from said bearing members to the receiving devices of said set, and means to connect the bearing members to the loop Wiring.

3. Aerial loop mechanism for a radio re-` ceivin set, embodying a rotatable, vertical, loop saft supporting loop Wiring, a pair of spaced apart insulated bearing sleeves se cured to said shaft, a pair of spaced apart fixed journal bearings to house said bearing sleeves, spring-pressed electrical contactmembers, one 'for each of said journal bearings, connected to the receiving devices of said set, and means to connect the bearing sleeves to the loop Wiring.

Signed at New York, in the county of New York, and State of New York, this 28th day of January, 1924.

VICTOR ALVEAR. 

